Question

(2x-5y+7z)² evaluate
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Answer 1

Answer:

4x^2-25y^2+14z^2

Answer 2

Answer:

Step-by-step explanation:

(2x-5y+7z)²

(2x)²+(-5y)²+(7z)²+2(2x)(-5y)+2(-5y)(7z)+2(7z)(2x)

4x²+25y²+40z²-20xy_70yz+28xz

identity used: x²+y²+z²+2xy+2yz+2xz